Sample preparation is done in chemical labs worldwide, including in regions such as Germany, Mexico, and Japan. In analytical chemistry, sample preparation represents the various methods in which a sample is prepared before its specific analyses. The preparation is an important step in all analytical methods, as the methods employed are frequently not sensitive enough to the analyte in its in-situ form, and/or the precipitated results are highly distorted by other interfering species. The standardization of samples is a process that involves both physical and chemical properties of the sample, and their comparison with the standards used by coworkers and by the laboratory. In addition, in order to provide reliable data for a test, samples must be standardized. There are several common types of sample preparation procedures.
In the case of liquids, sample preparation steps include the conversion of the sample to a specific liquid concentration, through various physical processes, such as precipitation, elution, injection, and dissolution. Among the processes used to convert a sample to a liquid concentration are distillation, air dilution, absorption, sub-cooling, and many others. The analysis of a solid sample involves several steps. Among them, the most important ones are the first step, which is the preparation of the sample in a solid medium, for example, solid carbonates, and the step of the analysis, which is carried out after the sample has been dried up. Other sample preparation steps include the titration of the analytes against a specific standard, the grinding of sample powders, the making of a sample solvent, and the analysis of the collected sample by various methods. The analysis of various materials using the sample preparation process includes spectroscopy, which is carried out on the analytical solutions of various elements... Read more